<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
        "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <title>Title</title>
</head>
<body>

<script type="text/javascript" src="../static/base64.js"></script>
<script type="text/javascript">
   var  str = 'xxkty'+'123456'
   var encodeStr = Base64.encode(str);
   console.log(encodeStr);
   var  decodeStr = Base64.decode(encodeStr);
   console.log(decodeStr)
</script>
</body>
</html>